91659848689 has 4 divisors (see below), whose sum is σ = 91691688960. Its totient is φ = 91628008420.

The previous prime is 91659848677. The next prime is 91659848701. The reversal of 91659848689 is 98684895619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (91659848677) and next prime (91659848701).

It is a cyclic number.

It is not a de Polignac number, because 91659848689 - 2²⁷ = 91525630961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91659848669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15915817 + ... + 15921574.

It is an arithmetic number, because the mean of its divisors is an integer number (22922922240).

Almost surely, 2^91659848689 is an apocalyptic number.

It is an amenable number.

91659848689 is a deficient number, since it is larger than the sum of its proper divisors (31840271).

91659848689 is a wasteful number, since it uses less digits than its factorization.

91659848689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31840270.

The product of its digits is 268738560, while the sum is 73.

The spelling of 91659848689 in words is "ninety-one billion, six hundred fifty-nine million, eight hundred forty-eight thousand, six hundred eighty-nine".